2.5x3.5". 587 card issue which offered a back innovation, a quiz question which could be answered by rubbing of a white panel. Although his MLB career was quite short, Koufax is regarded by many as being the most dominant left-handed pitcher in MLB history during his five-year career peak. Sandy finished his career w/a record of 165-87 along w/an ERA of 2.76 and 2,396 strikeouts. Koufax was inducted into the National Baseball Hall of Fame in 1972. Sandy has applied a nice signature running vertically to the left of his image.